class Sum {
	int n;
	float f() {
		float sum=0;
		for (int i=1;i<=n;i++) {
			sum+=i;
		}
		return sum;
	}
}
class Average extends Sum {
	int n;
	float f() {
		float c;
		super.n=n;
		c=super.f();
		return c/n;
	}
	float g() {
		float c;
		c=super.f();
		return c/2;
	}
}
public class Dome07 {
	public static void main(String args[]) {
		Average aver=new Average();
		aver.n=100;
		float resultOne=aver.f();
		float resultTwo=aver.g();
		System.out.println("resultOne="+resultOne);
		System.out.println("resultTwo="+resultTwo);
	}
}